Uniform Circular Motion — Flashcards
ICSE · Class 11 · Physics
35 flashcards for Uniform Circular Motion (ICSE Class 11 Physics) to test yourself on key terms and facts. Sample: "State the meaning of circular motion"
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State the meaning of circular motion and uniform circular motion.
Answer
Circular motion is motion in a plane along a circular path. Uniform circular motion is circular motion with constant speed. In uniform circular motion, speed remains constant but velocity changes cont…
Why does velocity change in uniform circular motion even when speed remains constant?
Answer
Velocity changes because velocity depends on both speed and direction. In uniform circular motion, speed stays constant, but the direction of motion keeps changing along the tangent to the circle. The…
A particle moves on a circle of radius 5 m and covers an arc length of 10 m. Find the angular displacement.
Answer
Given: arc length ΔS = 10 m, radius r = 5 m Formula: Δθ = ΔS/r Step 1: Δθ = 10 m / 5 m = 2 Answer: Δθ = 2 rad…
State the formula for angular displacement and give its SI unit.
Answer
Formula: Δθ = ΔS/r Meaning: ΔS is arc length and r is radius. SI unit: radian If ΔS = r, then Δθ = 1 radian.
A body completes one revolution in 4 s. Find its average angular velocity.
Answer
Given: time period T = 4 s Formula: ω̄ = 2π/T Step 1: ω̄ = 2π/4 s = π/2 rad/s Answer: ω̄ = π/2 rad/s…
A wheel makes 3 revolutions per second. Find its average angular velocity.
Answer
Given: n = 3 rev/s Formula: ω̄ = 2πn Step 1: ω̄ = 2π × 3 = 6π rad/s Answer: ω̄ = 6π rad/s…
State the formula for instantaneous angular velocity and its unit.
Answer
Formula: ω = dθ/dt Meaning: angular velocity is the rate of angular displacement. Unit: rad/s Dimensional formula: [T⁻¹]…
A particle moves in a circle of radius 2 m with angular velocity 5 rad/s. Find its linear velocity.
Answer
Given: r = 2 m, ω = 5 rad/s Formula: v = rω Step 1: v = 2 m × 5 rad/s = 10 m/s Answer: v = 10 m/s…
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